Using two different minera boxes. One is running minerd with gridseed black blades and the other is running cgminer running a pair of Zeus miner boxes. Both exhibit the same behavior. I am using the http:// prefix rather than the stratum+tcp://

They work perfectly when attached to other pools running standard stratum.

So I created a mining pool using p2pool. Works good with my little bit of hash on but would be interested how it reacts to other miners. There are 5 coins to choose from at the moment- Bitcoin, Joulecoin, Mazacoin, Terracoin, and Titcoin.